# BOUNDLESS BIO INC COM

BOUNDLESS BIO INC COM is a security (CUSIP 10170A100) tracked across SEC portfolio filings. 35 institutional managers reported $9.3M on Form 13F as of 2026-06-30; 2 registered fund positions totaling $1.5M via N-PORT as of 2026-05-31.

## Summary

- Issuer: BOUNDLESS BIO INC
- Class: COM
- CUSIP: 10170A100
- Asset category: EC
- 13F holders: 35
- 13F value: $9.3M
- 13F period: 2026-06-30
- N-PORT fund positions: 2
- N-PORT value: $1.5M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 35 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| FMR LLC | BOSTON, MA | $3.0M | 2,695,455 |
| [CITADEL ADVISORS LLC](https://search.stillhousedata.com/firm/148826) | MIAMI, FL | $1.5M | 1,342,131 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $795K | 662,757 |
| [SECTORAL ASSET MANAGEMENT INC](https://search.stillhousedata.com/firm/110345) | MONTREAL, A8 | $746K | 678,574 |
| [Stonepine Capital Management, LLC](https://search.stillhousedata.com/firm/139891) | Bend, OR | $657K | 597,682 |
| WELLINGTON MANAGEMENT GROUP LLP | BOSTON, MA | $612K | 556,233 |
| [RENAISSANCE TECHNOLOGIES LLC](https://search.stillhousedata.com/firm/106661) | NEW YORK, NY | $439K | 399,000 |
| [Alyeska Investment Group, L.P.](https://search.stillhousedata.com/firm/155058) | CHICAGO, IL | $330K | 300,000 |
| RBF Capital, LLC | SAN FRANCISCO, CA | $220K | 200,000 |
| Ensign Peak Advisors, Inc | SALT LAKE CITY, UT | $206K | 187,500 |
| Sio Capital Management, LLC | New York, NY | $180K | 163,679 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $140K | 127,576 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $110K | 99,875 |
| [LANDSCAPE CAPITAL MANAGEMENT, L.L.C.](https://search.stillhousedata.com/firm/165336) | Englewood, NJ | $94K | 85,792 |
| BlackRock, Inc. | New York, NY | $78K | 70,675 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [Fidelity Growth Company Fund](https://search.stillhousedata.com/fund/S000007119) | Fidelity Mt. Vernon Street Trust | $1.3M | 0.13% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $167K | 0.02% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/10170A100.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.